Die.



No. 883,695 PATBNTBD APR. 7, 190s.

' APPLICATION FILED KABQ. 111111 6.

4 mvENToR ma. @-4

ATTORNEYS Q., BY v v lll' UNITED sTATEs EATENT oEEroE.

FERDINAND E. OANDA, OI*1 NEW YORK, N. Y., ASSIGNOR TO CHROME STEELWORKS, OF

CHROME, NEW JERSEY, A CORPORATION OF NEW JERSEY.

DIE.

Specification. of Letters Patent.

Patented April '7, 1908.

To all 'whom it may concern.

B eit known that I, FERDINAND E. OANDA, a citizen of the United States,residing at New York, in the county of NewYork andI State of New York,have invented certain new and useful Improvements in Dies; and I dohereby declare the following to be a full, clear, and exact descriptionof the same, such as will enable others skilled in the art to which itappertains to make and use the same.

My invention relates to means for cooling dies of presses and the likeand consists in means for circulating cooling fluid through or aroundsuch dies, all as more fully hereinafter described and particularlypointed out in the claims.

The objects of my invention are to avoid over-heating of ress dies andthe like and to provide simp e, inexpensive and reliable means forcooling the same.

I shall particularly describe my invention with reference to dies forforging presses such as are used for extremely heavy work, theparticular die illustrated, being one intended for a hydraulic forgingpress of the type illustrated in my Patent No. 7 51,430, dated February2nd, 1904; but it will be understood that the invention is applicable tovarious other and smaller types of dies, as well as to dies for manydifferent kinds of machines and presses.

In the accompanyin drawings; Figure l shows a central vertica section ofthe die of the forging press such as referred to, with the liner of saiddie in place; Fig. 2 shows a horizontal transverse section of said partson the line :c of Fig. l; and Fig. 3 shows an elevation of the linerremoved from the die, and particularly shows the exterior spiral grooveof such liner, through which cooling fiuid circulates.

In the said drawings: 1 designates an anvil die for a forging press,such as above referred to, and 2 a liner bushing therefor. This bushingfits closely within the bore of the die, being in fact usually forced inplace under great pressure. It may, however, be removed by theapplication of pressure, and such bushings are from time to time removedand replaced by others as they become worn or as the size or style ofthe work to be done in the press is changed, a number of bushings ofdifferent sizes being frequently provided for the same die. When inplace in the press, there is a hydraulic plunger immediately beneath thebore of the die and another hydraulic plunger above the same. The heatedingot to be pressed is placed within the bore of the bushing, restingupon the lower of said plungers and then by the action of the upperplunger, the ingot is compressed within the die and finally is forcedoutward, usually by the action of the lower plunger. I do not illustratethese plungers, as their location with respect to the anvil die and themethod of operation of the ress is well known to those acquainted withhydraulic forging presses. It will be readily ap arent that much heatwill be communicate from the highly heated ingot to the die, and that inorder to avoid delay in the operation of the press it is highlydesirable to provide means for carrying off the heat thus cornmunicatedto the die. This I do, in the construction shown, by providing in theside of the removable bushing 2 a spiral groove 3 and by providing inthe inner wall of the die 1 grooves 4 and 5 adapted to registerrespectively with the upper and -lower convolutions of the groove 3 whenthe bushing is in place. Duets 6 and 7 lead from these grooves 4 and 5to the outside, and there may be connected to pipes for sup lying andplarlying off cooling water or otlier cooling Owing to the close t ofthe bushing to the die proper, it is not usually necessary to pack orlute the joints between the die and bushings at the top and bottom.

n the operation of the press, water or other cooling fluid is circulatedfrom duct 7 and through the spiral groove 3 in the bushing to duct 6 andthence outward, the water so circulated absorbing the heat communi*cated to the bushing from the heated ingot andfkeeping the bushing anddie relatively cool and at practically a uniform temperature.

What I claim is l. A die for forging presses and the like, comprising adie proper and a liner bushing fitting therein, said bushing having inthe face adjacent to the die proper a channel for the circulation ofcooling fluid, said die ro* vided with means for supplying cooling uidto said channel.

2. A. die for forging presses and the like, comprising a die proper anda liner bushing therefor, said bushing provided in the face adjacent tothe die proper with a s iral groove for the circulation of cooling uid,said die provided with supply and discharge ducts communicating Withsaid groove.

5 3. A. die for forging presses and the like,

comprising a die proper and a liner bushing therefor, said liner bushinghaving in its outer surface a spiral groove for the circulation ofcooling fluid, the die proper having supply 10 and discharge ducts andgrooves connected therewith and extending around the inner surface ofsaid die proper, said grooves adapted to register with the spiral grooveof the bushing when said bushing is in piace.

In testimony whereof I aHiX my signature,A l5 in the presence of tWoWitnesses.

FERDINAND E. CANDA. Witnesses:

ALPHONSE KLoH, H. M. MARBLE.

